Automatic turning machine



4 Sheets-Sheet @MVM Aug. 12, 1930. G. F. YAGER AUTOMATIC TURNING MACHINE Filed Deo. 27, 1927 Aug. l2, 1930. G. F. YAGER 1,773,085

AUTOMATIC TURNING MACHINE Filed Dec. 27, 1927 4 Sheets-Sheet 2 G. F. YAGER AUTOMATIC TUNNING MACHINE l 4 sheetssheer 3 Aug. 12, 1930.

Filed Dec. 27. 192'? Aug. l2, 1930. G. F. YAGER 1,773,085

AUTOMATIC TURNING MACHINE Filed Dec. 27, 1927 4 Sheets-Sheet 4 Gtkouww Patented Aug. 12, i930 UNITED STATES PATENT OFFICE GEORGE F. YAGER, OF TOLDO, OHIO, ASSIGNOB TO THE BUNTIN G BRASS BRONZE COMPANY, OF TOLEDO, OHIO, A CORPORATION OF- OHIO AUTOMATIC TURNING MACHINE Application led December 27, 1927. Serial No. 242,885,

This invention relates to metal working machines but more particularly'to machines for turning or otherwise working 011 sleevelike articles, such as bushings.

An important object of this invention is to provide a simple and efficient machine for turning bushings to which the bushings are automatically fed in such a manner that a bushing-is turned at each relative reciprocatory movement of the working tool.

Another object is to provide a machine of the above character which will securely en-` gage opposite ends' of a bushing but regardless of the size of the bushing the force will not be of such force as to distort the metal.

Other objects and advantages Will hereinafter appear.

An outstanding characteristic of the invention resides in the provision of means for turning or otherwise working on bushings or similar articles in which the tool has relative reciprocatory movement with respect to4 a rotating holding device to which the articles are automatically delivered. The mechanisms are so timed that a new article is delivered to the holding device at the end of the relative movement of the tool in each direction so that after the tool has completed a complete forward and backward movement two bushings will have been worked on and discharged from the machine. The machine is entirely automatic and al1 that is required of a workman is to see that suicient new articles are at hand to be engaged by the feed device.

The invention is shown in the accompanying drawings in which:

Fig. 1 is a side elevation of a bushing-turning machine;

Fig. 2 is a view in elevation of the opposite side'of the machine with some parts broken away and in section;

Fig. 3 is a section on the line of Fig. 2;

Fig. 4 is a section on the line 4 4 of Fig. l;

Fig. 5 is a fragmentary end elevation partly in section of one end of the machine showing the lever arrangement for moving an arbor support;

Fig. 6 is a detail plan view of the bushing trough showing the manner in which the bushings are fed to the holding jaws; and

Fig. 7 is a fragmentary end elevation of the holding jaws. r

The illustrated embodiment of this invention comprises a main frame 1 having a belt driven shaft 2, which is connected to be driven by a pulley 3 Afrom any suitable source of power. The shaft'2 is connected by suitable gearing'to drive a` shaft 4 Which is spaced above and` in parllel relation to the shaft 2. A control lever 5 is provided for connecting and disconnecting the source of power with the driving wheel 3. The mechanism for driving the shaft 4 forms no part of the present invention, and detailed description there of is deemed unnecessary. In order to enable the shaft 4 to be manually turned, a hand- Wheel 6 is connected through shafts 7 and suitable gearing to a driven gear 8 on the shaft 4. It is apparent that by turning the wheel 6 in one direction or the other, the shaft 4 may be rotated for adjusting the position of the parts to the desired position.

Mounted on the upper portion of the frame 1 in horizontal spaced relation are pairs of guides 9, a pair heilig disposed'at each end portion of the main frame. Slidable in the guides 9 are frames 10 in which arbors 11 are mounted for rotation. Fixed to each arbor 11 is a pulley 12, which may be connected by a belt to any suitable source of power, an

opening 13 being provided in the top of each frame l() to enable the belt to extend therethrough.

The horizontally spaced arbors 11 are continuously rotated by means of the pulleys 12, and each arbor is adapted to receive a chuck 14, which may be of the type shown and described in my copending application,

Serial Number 225,144, filed October A10, 1927.

The chucks 14 are adapted to engage and securely hold a bushing B in such a manner that the bushing is rotated with the chucks.

As will hereinafter be described, pressure in opposite directions is exerted on the bushing B through the arbors 11 for securely retaining the bushing against movement relative to the arbors.

Horizontally reciprocatory across the face of the bushing B, is a tool l5 for turning a bushing to the proper dimensions. While a bushing B is being rapidly rotated by the chucks 14, the tool 15 is moved horizontally 'across the bushing, and after one bushing is turned the chucks 'are separated from each other to discharge the turned bushing and receive an unturned bushing. When the tool 15 reciprocates in the opposite direction, it turns another bushin so that in eachdirection of movement o 'the tool, one bushing is turned.

As shown, the tool 15 is carried by a mounting 16, and is adjustable outwardly from the mounting by a set screw 17. The mounting 16 is suitably secured to a support 18l held against outward movement by a pin 19. The support 18 is mounted on a carnage 20 havin a dove tail connection with a guide 21.

orizontal reciprocatory movementl is imparted to the carriage 2O by a lever 22 connected at its upper end to the carriage by a link 23. The lever 22 is ivoted intermediate its ends u on a stub sha t 24 mounted on the machine rame 1 and the lower end of the lever 22 is connected to be operated by a cam wheel 25 on the horizontal drive shaft 4. The cam wheel 25 is provided with a cam slot 26 with which the lever 24 is connected for operation, and the slot 26 is so formed that during one revolution thereof the tool carriage 20 is moved to the right (Fig. 1) to turn one bushing and is there moved'back to its original position, during which movement another bushing is turned. It is apparent by this arrangement that bushings may be very rapidly turned, and this operation is a marked improvement over the usual method, in which only a single bushing is turned during a complete stroke of the tool.

Means are provided for exerting a yielding force against the outer ends of the arbors 11 for forcing the chucks 14 toward each other so that not only may a bushing be securely held in lace, but excessive distortive force a ainst t e ends of the bushings is prevented.

is is an important feature of the present invention, because in handling bushings, the walls of which are relatively thin, distortion may readily take place unless compensation is made therefore. It is further found that in bushin s of bronze or other similar materials whic are cast, the thickness of the walls may vary considerably, and therefore, al,

' swinging movement of the arm 28 imparts horizontal reciprocatory movements to the su port 10 which is guided by the guides 9.

e lower end of each arm 28 is pivoted to a housin 30 enclosing a coiled spring 31. Within tE rod 32 in which telescopes a ruide rod 33, to which is fixed a block 34 fixe to the housing 30. The opposite end of thc tubular rod 32 has a universal connection with a mounting 35 provided with a roller 36 disposed in a cam slot 37 of a roller 38 which 1s mounted for rotation with the shaft 4. A link 36 pivotally connects the mounting 35 with a side of the machine frame 1.

A roller 36 is similarly connected for reciprocating each arbor fra-me 10 and the cam slots 37 are oppositely disposed so that the` supports 10 are simultaneously moved toward and away from each other. v'lhe coil spring Bland associated parts enable the rods 32 to move relatively to the levers 28 so that after sufficient pressure is exerted by the chucks 14 on opposite ends of the bushing, further movement of the chucks 14 toward each other is prevented, additional movement of the parts connecting the cams 38 and arbor frames 10 being resiliently absorbed or taken up by the coil springs 31.

Another important phase of this invention resides in automatically feeding or delivering bushings to the chucks 14 in such a manner that a new bushing is delivered to the chucks after the preceding bushing has been turned and discharged from the machine. Bushings are fed in such a manner that two bushings are delivered to the chucks during a complete stroke of the tool 15. For this pur )ose a bushing-receiving trough 39 is mounte on the main frame 1 adjacent the juxtaposed end portions of the chucks 14 and is inclined downwardly toward the chucks, a stop 40 being provided on the inner end of the trough to prevent the bushings from dropping from the trough.

Secured to the underside of the trough 39 is a bracket 41 which extends downwardly therefrom and is provided with a plurality of vertically elongate openings 42 to receive bolts 43. This enables the bracket 41 to be adjusted vertically with respect to the main frame to adjust the vertical position of the trough 39. The bolts 43 are connected to a bracket 44 having horizontal elongate openings 45 to receive bolts 46 connecting the bracket 44 to the main frame. It is apparent that by loosening the bolts 46 the trough 39 may be horizontally adjusted to the desired position.

Provided at one end portion of the trough 39 is an upright wall 47 against which one end of the bushings B may abut. An upright slide 48 mounted for horizontal adjustment on the trough 39-is adapted to guide the opposite ends of the bushings B. The inner ends of the walls 47 and 48 are spaced e housing 30 1s a tubular operating loo from the stop to enable one bushing to be engaged at one side of the trough and forced therethrough, as will hereinafter be described.

For forcin a bushing from the inner end of the trougi a plunger 49 has horizontal reciprocatory movements relative to the main frame 1 and is suitably mounted on a carriage 50. For reciprocating thecarriage 50 a lever 51 having a forked end 52 operatively engages the carriage 50 and extends downwardly therefrom. The lower end portion of the lever 51 is pivoted at 53 and is retained in engagement with a cam wheel 54 by a coil spring 55. The cam 54 is mounted on the shaft 4 and is so constructed that during one revolution of the roller, two complete strokcs are imparted to the plunger 49 to force two bushings from the trough 39.

From the trough 39 the bushings B are forced by the plunger 49 into engagement with clamping jaws 55, which are pivoted at 56 to an arm 57, a coil spring 58 between the inner ends of the arms forcing the outer ends toward each other. The plunger 49 is disposed at one side of the trough 39 and engages that portion of the bushing positioned in the space between the stop 40 and trough. Set screws 59 enable the normal position of the jaws to be adjusted. The inner sides of the jaws 55 are beveled at 60 where the bushings B arevfirst brought into engagement with the clamping jaws toenable the jaws to be cammed or forced open in order to readily admit a bushing.

The inner end of the arm 57 is pivoted to an upright bracket 61 on the machlne frame, and a stop arm 62 is associated with the arm 57 for engagement with the bracket 61 to permitthe arm 57 to be swung sufficiently inwardly to position a bushing for engagement by the chucks 14. As shown, a coil spring 63 disposed within a housing 64 on the bracket 61 engages the arm 57 and yieldingly urges the same inwardly into position to feed the bushing to the chucks 14.

Normally, the arm 57 is held away from the chucks 14 adjacent the trough 39 in position'to receive a bushing delivered thereto by the plunger 49. For holding the arm 57 in such position, a flexible cable 65 connects the arm 57 with an upright arm 66 of a bell crank lever 67. The bell crank lever 67 is pivoted at 68 to the machine frame, and the short arm 69 thereof has a roller 70 at the outer end to engage a cam surface 71 on one of the cam wheels 38. The cam 71 is so constructed that upward movement is imparted to the short arm 60 of the bell crank 67 twice during a revolution of the cam wheel 38.

Downward movement of the short arm 69 of the bell crank lever swings the upper end of the vertical arm 66 inwardly toward the chucks 14 to permit the c oil spring 63 to swing the arm'57 to bushing-feeding 'posiing has been turned by the tool 15 moving in i the opposite direction, the feed'device operates to deliver another bushing to chucks. The movement of the chucks relative to each other, the tool 15, plunger 49 and arm 57 are 'so synchronized that continuous operation of, the machine automatically takes place, bushings drop ing from the chucks 14 from the machine tlirough a discharge chute 70.

IVhile I have shown and described a construction which is the best form known to me at the present time, it is to be understood that numerous changes in details of construction, arrangement and operation may be effected without departing from the spirit of the invention, especially as defined in the appended claims. Although I have described the machine in connection with bushings, it is to be understood that the machine is adapted for articles other than bushings and the above description is to be considered by way of illustration and not of limitation.

What I claim as new and desire to Asecure by Letters Patent is:

1. In a machine of the vclass described, the combination of a pair of aligned spaced rotatable chucks adapted to receive a bushingtherebetween, a relatively reciprocable tool for turning the bushing, means for moving the tool parallel to the axis of rotation of the bushing, and automatic means to feed a bushing into operative position to be engaged by said chucks at the end portion of the movement of said tool in each direction whereby to cause the tool to operate upon two bushings in each full reciprocation of the tool.

2. A machine of the class described comprising a pair of aligned spaced rotatable chucks adapted to receive a bushing therebetween, means for recurrently moving said chucks away from each other to discharge a bushing therefrom, a relatively reci rocable tool for turning the bushing engage by said chucks, means for moving the tool parallel to the axis of rotation of the bushing, and means operating in timed relation to said chucks and tool for feeding a bushing to said chucks at the end portion of the movement of the tool in each direction whereby to cause the tool to operate upon two bushings in each full reciprocation of the tool.

3. In a machine of the class described, a pair of spaced bushing-receiving rotatable lll ada ted to enga chucks, a bushingturnin thol having reciprocable movement relativeito said chucks, means for moving the tool parallel to the axis of rotation of the bushlng, and automatic means for4 feeding bushings to said chucks at the end portion of such relative movement in opposite directions whereby7 to cause the toolto operate upon two bushings in each full reciprocation of the tool.

4. In a machine of the class described, a pair of spaced bushing-receiving chucks the opposite ends of a bus ling, means or yieldingl forcing said chucks toward each other to li'old a bushing in position, a tool for turnin the bushings reclprocable relative to said c ucks wherebyV to cause the tool to operate upon two bushings in each full reciprocation of the tool and means for moving the tool parallel to the axis of rotation of the bushing.

5. In a machine of the class described, rotatable means for engaging opposite ends of a bushing to hold the same in position, a reciprocab e tool for turnin the bushings, means for automatically feeding bushings to said engaging means at the end of each stroke of said tool, means for moving the tool parallel to the axis of rotation'of the bushing and means for recurrently disengaging said engaging means to discharge a turned bushing and receive a new bushing whereby to cause the tool to operate upon two bushings in eachfull reciprocation of the tool.

6. In a machine of the class described, a pair of spaced aligned rotatable chucks for receiving a bushing therebetween, a tool reciprocable relatively to said chucks for operating on the bushing, means for moving the tool parallel to the axis of rotation of the bushing, means for imparting bushing-engaging` and releasing movements to said chucks, and an automatic feed device for delivering a bushing to said chucks at each end of the relative movement between said chucks and tool whereby to cause the tool to operate upon two bushings in each full reciprocation of the tool.

7. In a machine for turning bushings, a trough for bushings, clamping members adapted to receive a bushing therebetween, plunger means for forcing a bushing from the trough to said clamping members, rotatable chuck means. and means independent of the plunger means for moving said clamping members to said chuck means for feeding a Y bushing thereto.

8. In a machine for turning bushings a support for bushings, a bushing holder, means independent of the holder for forcing a bushing from said support into engagement with said bushing holder, chuck means, and means for actuating said holder to feed a bushing to said chuc means.

9. In a machine for turning bushings, chuck means, a bushing supply means spaced from said chuck means, and means for automatically feeding bushings from said supply means to said chuck means, said means comprising a pivoted arm, spring-pressed clamping jaws carried by said armz plunger means for forcing a bushin from said supply means into engagement with said clamping jaws, and means to cause movement of said arm to said chuck means for delivering a bushing thereto.

10. 1n a machine of the type described, work rotating means, reciprocal tool carr ing means operable lengthwise of the work, means to release the completed work from said rotating means upon the tool completing each stroke in a full reciprocation tiereof, and means to feed new work to said rotating means upon each release of the completed work whereby to cause the tool to operate upon two different pieces of work in each full reciprocation of the tool.

1l. In a machine of the type set forth, work rotating means, a hopper, means to eject the work from the hopper, a pair of pivoted spring pressed jaws formed to embrace the work, a pivoted spring pressed member carrying said jaws, means for normally holding said member and thereby the jaws out of register with the rotating means, and means for actuating vsaid member about its ivot to cause the jaws carried thereby to register with the rotating means thereby to transfer the work l to the latter.

l2. In combination with work rotating means, and a hopper having an outlet, a pivoted arm, work gripping means carried by the arm, means to normally hold said arm in register with the hopper outlet, means to ej ect the work through the hopper outlet and into engagement with the gripping means and means for effecting pivotal movement of the arm and thereby said gripping means to cause the latter to register with the rotating means thereby to transfer the work to the latter.

13. In a machine ofthe class described, an inclined guide for bushings, a lstop at the lower end of said ude for limiting the movement of the bushings, and means for recurrently eifectinr bodily movement of the bushings from said5 guide, said means comprising a swinging arm having provision for receiving a bushing, means tending to hold said arm in bushing-receiving position, means to im art swinging movement` to said arm, and a fleder for advancing a bushing from said guide to said arm, thereby to discharge a bushing previously delivered to said arm and replace same by another bushing.

14. In a machine of the class described, a guide to receive a plurality of bushings, and means. operable recurrently for effecting bodily movement of the guide, said means comprising an arm having an opening to receive a bushing, means to impart to and fro movement to said arm, and a recurrently oplll erable feeder for forcing a bushing from said guide to said arm, thereby to discharge a bushing previously carried by said arm and replace same with another bushing.

15. In combination with work rotating means, tool carrying means, means to effect relative reciprocation between the work rotating means and the tool carrying means in a direction parallel to the axis of rotation of the Work, means to release the completed work from said rotating means upon completion of each strokein a full relative reciprocation between the work rotating and tool carrying means, and means to feed new work to said rotating means upon each release of the completed work whereby to cause operation of the tool upon two different pieces of work in each full relative reciprocation between the work rotating and tool carrying means.

In testimony whereof I have hereunto signed my name to this specification.

GEORGE F. YAGER. 

